Northern Industrial Tools Ratcheting Pipe Threaders - 12-Pc. Set Includes 7 pipe dies: 3/8in., 1/2in., 3/4in., 1in., 1 1/4in., 1 1/2in. and 2in. 3/8in. die is 18 TPI 1/2in. and 3/4in. dies are 14 TPI 1in. and 2in. dies are 11 1/2 TPI All other dies are 11 TPI